0444973 - ÚFP 2016 RIV NL eng J - Článek v odborném periodiku
Coenen, J.W. - Arnoux, G. - Bazylev, B. - Matthews, G. F. - Jachmich, S. - Balboa, I. - Clever, M. - Dejarnac, Renaud - Coffey, I. - Corre, Y. - Devaux, S. - Frassinetti, L. - Gauthier, E. - Horáček, Jan - Knaup, M. - Komm, Michael - Krieger, K. - Marsen, S. - Meigs, A. - Mertens, Ph. - Pitts, R.A. - Puetterich, T. - Rack, M. - Stamp, M. - Sergienko, G. - Tamain, P. - Thompson, V.
ELM induced tungsten melting and its impact on tokamak operation.
Journal of Nuclear Materials. Roč. 463, August (2015), s. 78-84. ISSN 0022-3115. E-ISSN 1873-4820.
[PLASMA-SURFACE INTERACTIONS 21: International Conference on Plasma-Surface Interactions in Controlled Fusion Devices. Kanazawa, 26.05.2014-30.05.2014]
Institucionální podpora: RVO:61389021
Klíčová slova: plasma * tokamak
Obor OECD: Nuclear related engineering
Impakt faktor: 2.199, rok: 2015
http://www.sciencedirect.com/science/article/pii/S0022311514005960#

In JET-ILW dedicated melt exposures were performed using a sequence of 3MA/2.9T H-Mode JET pulses with an input power of PIN = 23 MW, a stored energy of ~6 MJ and regular type I ELMs at DWELM = 0.3 MJ and f ELM ~30 Hz. In order to assess the risk of starting ITER operations with a full W divertor, one of the task was to measure the consequences of Wtransients melting due to ELMs. JET is the only tokamak able to produce transients/ ELMs large enough (>300 kJ per ELM) to facilitate melting of tungsten. Such ELMs are comparable to mitigated ELMs expected in ITER. By moving the outer strike point (OSP) onto a dedicated leading edge the base temperature was raised within 1 s to allow transient ELM-driven melting during the subsequent 0.5 s. Almost 1 mm (~6mm3) of W was moved by ~150 ELMs within 5 subsequent discharges. Significant material losses in terms of ejections into the plasma were not observed. There is indirect evidence that some small droplets (~80 lm) were ejected.
Trvalý link: http://hdl.handle.net/11104/0247400